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Red Hat Cluster Notes

1) Cluster types: – High Availability / Failover cluster (Ideal for Database, file servers) – Load Balancing  (Ideal for high load web traffic) – High Performance (Large computational problems) 2) Clustering can be implemented in two ways . – Active – Active ( Both nodes [Read More]

LVM Thing Provision

The concept of LVM Thin Provision is to create a new size of POOL other than Volume Group (VG) from where you can create very much larger size of Logical volume partition. Here are few simple steps are given ============================ We can assume that we [Read More]

How to use vmstat command in linux

vmstat (virtual memory statistic) which is generally used for system monitoring purpose [root@puppetmaster ~]# vmstat procs ———–memory———- —swap– —–io—- –system– —–cpu—– r b swpd free buff cache si so bi bo in cs us sy id wa st 0 0 0 265492 29852 355740 0 [Read More]

How to enable bash-completion in ubuntu 14.04

1. You need to reinstall bash-completion by using below command learning@learning:~/Desktop$ sudo apt-get install –reinstall bash-completion 2. Now you need to write it in .bashrc file like below given at very last line learning@learning:~/Desktop$ sudo vim /root/.bashrc if [ -f /etc/bash_completion ] && ! shopt [Read More]